Air Supply: On the worst days, visibility at Rocky Mountain National Park may be about half what it should be because of haze created by pollution, the subject of a lawsuit by the Environmental Defense Fund (Denver Post). WildEarth Guardians has also filed a suit alleging the Arkansas River Power Authority has violated the Clean Air Act hundreds of times, releasing toxic emissions from its coal-fired plant in Lamar (Trinidad Times-Independent).

Resounding Rails: Echo Mountain, the 90-acre ski/snowboard park west of Evergreen, doesn’t have the national reputation of Colorado’s bigger resorts. But most of those places would love to have Echo’s 20 percent annual revenue growth over the past five years (Denver Post).

CSU Golfer Ballin’: Martin Laird, a 2004 Colorado State University graduate, sits at No. 21 on the World Golf Rankings and third on the PGA Tour money list, with $1.9 million (Fort Collins Coloradoan).

O2 Combat: Altitude sickness is the subject of a new University of Colorado study that seeks to benefit not local visitors but rather soldiers, who may otherwise face headaches, wooziness, fatigue, and other symptoms in high elevations of Afghanistan (Associated Press).

In Memoriam: Legendary Latino activist Pierre Jimenez died Monday in Denver after a long bout with hepatitis C (Denver Post), and Rodney J. Smith, who was general manager of the Denver Performing Arts Complex from 1989 to 2003, died Sunday in San Antonio, Texas, where he lived (Denver Business Journal).